ArticlesArticles demonstrate ideas used in production. Every article contains download sample to give a touch to the real world of mathematical ideas used in the modern software.
Median filter is a filter of nonlinear class. This article is a practical guide for understanding and implementation of the filter — it contains theory, C++ source code, programming instructions and sample application. The application demonstrates the capability of the median filter to restore images corrupted by destructive noise. This is not the only kind of corruption the filter can filter out. Download the sample and try this “miracle” of image processing science. Generator of destructive noise and sample image are supplied as well.
That is not so easy to rotate the image in the screen because the screen picture is discrete. So what is the way? One should use special algorithms to calculate antialiased image. This sample demonstrates antialiased image rotation. You can process any 24bit BMP file.
Did you ever interested in question what form had a ball while rebounding from the ground? Do you want to see that? Live mechanics, physics and a bit more. Realtime interactive OpenGL graphics.
This sample demonstrates solving of the problem of optimal control theory. It is pure MatLab calculation sample.
Mean filter, or average filter maybe is the simplest filter of linear class. Nevertheless, it is used widely in signal and image processing, usually as a part of processing pipeline for signal (image) averaging and preparing it for further processing. The article is a practical introduction to this useful tool — it contains theory, C++ source code, programming instructions and sample application for demonstrating filter features.
Filter window, or filter mask is basic concept of signal and image processing. Every digital filter utilizes window idea. The article is close look at this important primitive.
Alphatrimmed mean filter is a filter of nonlinear class, by its nature — hybrid of median and mean filters. This article is a practical tutorial for understanding and implementation of the filter — it contains theory, C++ source code, programming instructions and sample application. The application demonstrates the capability of the alphatrimmed mean filter to restore images corrupted by impulse noise. Download the sample and try this item. Generator of impulse noise and sample image are provided as well.
Hybrid median filter is a filter of nonlinear class with good corner preserving capabilities. This article is a practical tutorial for understanding and implementation of the filter — it contains theory, C++ source code, programming instructions and sample application. The application demonstrates the capability of the hybrid median filter to restore images corrupted by impulse noise. Download the sample and try this item. Generator of impulse noise and sample image are provided as well.
Gaussian filter is a filter of linear class, by its nature is weighted mean. Another name for this filter is Gaussian blur. This article is a practical tutorial for understanding and implementation of the filter — it contains theory, C++ source code, programming instructions and sample application. The application demonstrates Gaussian blur application to color images. Download the sample and try this item.
Fast Fourier transform — FFT — is speedup technique for calculating DFT — discrete Fourier transform. This article is a practical tutorial for understanding and implementation of FFT — it contains theory, C++ source code and programming instructions. Popular CooleyTukey algorithm is considered.
Function handbook contains all trigonometric, hyperbolic and elementary functions: explore their definitions, plots and properties.
